To this day, no one could explain to me why Drow and half-Drow are KOS aside from 'they are black, and that's why they are feared.' By lore and logic, Drow would not be known in the setting to the average inhabitant, as there are so many races brought in - they would be, to the inhabitants, no different than other dark-skinned elves. And there are other races with 'odd' , unhuman, skin colors, only the BLACK is a problem. Only those who were brought in from the same realms would know of it. As such, the biases about 'Drow are bad; they will eat my children' are clearly taken from the Catholic/colonial culture that has created such images of angels and demons and associated black skin with it.
At this point, these reactions are nothing more than real-life racism.
I am writing anonymously, as always with this topic. There will be a majority who plays this down and pulls out the 'Cancel Culture' card.